Police say the suspect used a ladder attached to a nearby building to climb to the roof and open fire with a "high-powered rifle." Officers say that rifle, which the suspect left at the scene, is a critical piece of evidence. https://www.kare11.com/article/news/crime/person-of-interest-highland-illinois-park-parade-mass-shooting/285-19146bdd-fd55-4d9d-95dc-144b93c2ab64 Welcome to the KARE 11 News YouTube channel. Subscribe to our channel for compelling and dramatic storytelling, award winning investigations, breaking news and information you can use. Text your photos, videos and news tips to 763-797-7215. » Subscribe to KARE 11 on YouTube: https://www.youtube.com/user/KARE11?sub_confirmation=1 » Watch more KARE 11 video: https://www.youtube.com/user/KARE11/v... » Visit KARE11.com: http://www.kare11.com/ » Download our app! https://www.kare11.com/appredirect/ » Find KARE 11 on Facebook: https://www.facebook.com/KARE11/ » Follow KARE 11 on Twitter: https://twitter.com/kare11 » Follow KARE 11 on Instagram: https://www.instagram.com/kare11/